Geology lessons offered by huge circle of rock in Oregon

Zach Urness

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7:01 am CDT, Saturday, November 5, 2016

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ADVANCE FOR USE ON SUNDAY, NOV. 6, 2016, 12:01 A.M. AND THEREAFTER In this Sept. 20, 2016 photo, the Fort Rock State Natural Area is seen in the distance near Fort Rock, Ore. An enormous circle of jagged rock wall, Fort Rock provides an excellent level of natural protection. (Zach Urness/Statesman-Journal via AP)